Explainer:Why myopia gets worse over time

Here are the reasons your myopia gets worse:

Poor vision habits

• Too much close work,
• while wearing glasses that are too powerful (see Differentials),

The actual mechanism is an area of active research, but the general result is axial elongation. The eye grows longer, requiring stronger correction, in a cycle.

Other bad habits which affect vision, though probably don't contribute to progression of myopia:

• Not blinking enough, causing Dry eye